kernel: protection fault trap, code=0 Stopped at lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{1}> ddb{1}> set $lines = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace lf_findoverlap(1fe204ea14cf49cd,0,ffffff0069b293f0,ffff80000193c4e0,128) at lf_findoverlap+0xbb sys/kern/vfs_lockf.c:621 lf_setlock() at lf_setlock+0xbc lf_getblock sys/kern/vfs_lockf.c:586 [inline] lf_setlock() at lf_setlock+0xbc sys/kern/vfs_lockf.c:314 VOP_ADVLOCK(4517c557bd720b1b,ffffff006e66bda0,5,2,ffffff007e9a4970) at VOP_ADVLOCK+0x74 sys/kern/vfs_vops.c:699 sys_flock(5cb3301c921a29d7,830,ffff800021062978) at sys_flock+0x163 syscall(feffa2e7de391ef9) at syscall+0x496 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(feffa2e7de391ef9) at syscall+0x496 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,41a8f9f10d8) at Xsyscall+0x128 end of kernel end trace frame: 0x41cd58004c0, count: -6 ddb{1}> show registers rdi 0xdeadbeefdeadbeef rsi 0xffffffff819ca505 lf_findoverlap+0x95 rbp 0xffff8000211498a0 rbx 0xdeadbeefdeadbeef rdx 0xffff800001b3d000 rcx 0x11ea __ALIGN_SIZE+0x1ea rax 0xffff800001b3d000 r8 0xffff8000211498e8 r9 0x1 r10 0x310c95c1ae1f051c r11 0xc75bbec2bd8138dc r12 0x2 r13 0xffffff0069b293f0 r14 0xffff8000211498e8 r15 0 rip 0xffffffff819ca52b lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021149840 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor1) pid=287255 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000210624c8,0xffff8000210639f0 process=0xffff80002109b3c8 user=0xffff800021144000, vmspace=0xffffff007e835e80 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 5112 518279 39967 32767 2 0x10 syz-executor1 5112 344089 39967 32767 3 0x4000090 lockf syz-executor1 * 5112 287255 39967 32767 7 0x4000010 syz-executor1 5112 199678 39967 32767 7 0x4000010 syz-executor1 5112 177066 39967 32767 2 0x4000010 syz-executor1 92420 458428 49273 32767 3 0x90 piperd syz-executor0 49273 261882 16911 0 3 0x82 wait syz-executor0 39967 74427 36210 32767 3 0x90 nanosleep syz-executor1 36210 159002 16911 0 3 0x82 wait syz-executor1 61289 213161 0 0 3 0x14200 bored sosplice 16911 305078 36387 0 3 0x82 thrsleep syz-fuzzer 16911 233380 36387 0 3 0x4000082 thrsleep syz-fuzzer 16911 93186 36387 0 3 0x4000082 thrsleep syz-fuzzer 16911 311535 36387 0 3 0x4000082 kqread syz-fuzzer 16911 157728 36387 0 3 0x4000082 thrsleep syz-fuzzer 16911 470186 36387 0 3 0x4000082 thrsleep syz-fuzzer 16911 220683 36387 0 3 0x4000082 thrsleep syz-fuzzer 16911 384524 36387 0 3 0x4000082 thrsleep syz-fuzzer 16911 323413 36387 0 3 0x4000082 thrsleep syz-fuzzer 16911 472080 36387 0 3 0x4000082 thrsleep syz-fuzzer 36387 474669 9777 0 3 0x10008a pause ksh 9777 200800 49523 0 3 0x92 select sshd 21561 435035 1 0 3 0x100083 ttyin getty 49523 310859 1 0 3 0x80 select sshd 3047 259919 30986 73 3 0x100090 kqread syslogd 30986 305204 1 0 3 0x100082 netio syslogd 14202 355 1 77 3 0x100090 poll dhclient 88632 257603 1 0 3 0x80 poll dhclient 93611 370161 0 0 3 0x14200 pgzero zerothread 14309 414495 0 0 3 0x14200 aiodoned aiodoned 70067 282428 0 0 3 0x14200 syncer update 966 303664 0 0 3 0x14200 cleaner cleaner 66441 113647 0 0 3 0x14200 reaper reaper 9466 151611 0 0 3 0x14200 pgdaemon pagedaemon 81773 461530 0 0 3 0x14200 bored crynlk 38510 129083 0 0 3 0x14200 bored crypto 99107 519506 0 0 3 0x40014200 acpi0 acpi0 40340 37350 0 0 3 0x40014200 idle1 36882 105368 0 0 3 0x14200 bored softnet 30689 283009 0 0 3 0x14200 bored systqmp 31969 177724 0 0 3 0x14200 bored systq 56425 33356 0 0 3 0x40014200 bored softclock 24823 298852 0 0 3 0x40014200 idle0 1 246993 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper